{"product_id":"cleveland-c39581-square-end-mill-5-16-in-3-flute-hss","title":"Cleveland C39581 Square End Mill 5\/16 in 3 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CLEVELAND C39581 is a double-end, three-flute square end mill ground from high speed steel (HSS) and built for general-purpose milling in a machine shop environment. It features a 5\/16-inch cutting diameter, a 3\/4-inch length of cut, and a 3\/8-inch straight-cylindrical shank with a Weldon flat for positive tool holding. The 30-degree spiral flute geometry promotes efficient chip evacuation and smooth cutting action. The tool runs in a right-hand cut, right-hand flute configuration with centercutting capability, allowing plunge entry as well as conventional peripheral milling. Overall length is 3-1\/2 inches. The uncoated finish suits operators who prefer easy resharpening or who work in materials where coating adhesion is less critical.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for milling operations on cast iron, non-ferrous metals, and steel in both manual and CNC machining setups. The Series HD-3 designation places it in a regular-length category, making it appropriate for standard-depth slots, pockets, and profiling cuts where extended reach is not required. Machinists working in job shops or maintenance environments will find the double-end design an efficient use of tooling budget, as both ends are usable before the tool is retired.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-end design provides two usable cutting ends per tool\u003c\/li\u003e\n  \u003cli\u003eCentercutting construction allows direct plunge milling\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle promotes chip flow and reduces cutting forces\u003c\/li\u003e\n  \u003cli\u003eWeldon flat on shank provides secure seating in standard end mill holders\u003c\/li\u003e\n  \u003cli\u003eUncoated HSS construction allows conventional resharpening\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute for standard spindle operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use on cast iron, non-ferrous metals, and steel workpieces. Fits any standard end mill holder or collet accepting a 3\/8-inch straight shank with Weldon flat.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall in a Weldon-flat-compatible end mill holder and torque the set screw against the flat face to prevent axial pullout. Ensure the spindle and machine table are fully stopped before changing tooling. Verify runout at the cutting tip after installation before beginning a cut. Follow shop safety practices and applicable OSHA machining standards when operating milling equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/16 inch (0.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical with Weldon Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble End\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HD-3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Cast Iron, Non-Ferrous Metal, Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: CLEVELAND\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: C39581\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CLEVELAND CONTROLS","offers":[{"title":"Default Title","offer_id":51700329644338,"sku":"C39581","price":81.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0a53f896c17f2c1c48eabf05d6141920.jpg?v=1788389019","url":"https:\/\/voomisupply.com\/products\/cleveland-c39581-square-end-mill-5-16-in-3-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}